Points, Lines, Planes, Midpoint, Distance

line

A collection of an infinite number of points in a straight pathway with unlimited length and having no width.

ray

A part of a line, with one endpoint, that continues without end in one direction

point

A precise location or place on a plane. It is usually represented by a dot.

plane

A surface with length and width but no thickness, extending infinitely in all directions.

segment addition postulate

If B is between A and C, then AB + BC = AC

perpendicular lines

Lines that intersect to form right angles

coordinate

Ordered pairs that identify points on a coordinate plane. (x,y)

vertex

The common endpoint of an angle

distance formula

The distance d between any two points with coordinates

midpoint formula

a point that divides a segment into two congruent segment

pythagorean theorem

a² + b² = c²

x axis

horizontal axis

parallel lines

lines in the same plane that never intersect

line segment

part of a line with two endpoints

collinear points

points that lie on the same line

coplanar points

points that lie on the same plane

y axis

vertical axis